Water filtration unit



FIG. 1 is a front perspective view of a water filtration unit showing mynew design, the rear view being a mirror image;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The ornamental design for a water filtration unit, as shown anddescribed.